专业性练习摹仿签名笔迹鉴定的实验研究

目的本文通过实验对具有一定笔迹鉴定专门知识与不具备笔迹鉴定专门知识的人的练习摹仿签名笔迹进行实验分析研究。方法对两类人在练习的不同阶段形成的练习摹仿签名笔迹特征的一般状态表现,以及对其笔迹特征的形成、变化原因、鉴定价值分别进行了论述,并总结出其变化规律。结果为不同种类的练习摹仿签名笔迹的鉴定提供一定的识别和特征分析、评断的参考依据。     

亲子鉴定中STR基因座的基因突变分析

目的探讨Identifiler^TM荧光标记复合扩增试剂盒15个STR基因座在亲子鉴定中的基因突变特点。方法应用Identifiler^TM荧光标记复合扩增试剂盒检测676例亲子鉴定案，对其中1～2个突变基因座加做HLA等位基因检测或Y—STR基因座检测。结果在认定亲子关系的676例中，观察1304次减数分裂，Identifiler^TM荧光标记复合扩增试剂盒中的15个基因座确定19例突变，其中D18S51基因座4例，D2S1338基因座3例，D8S1179、D16S539、vWA、D7S820、D13S317基因座各2例，D5S818和TH01基因座各1例，D21S11、FGA、D3S1358、D19S433、TPOX、CSF1P0基因座未见突变；一步突变的17例，二步突变的为1例，四步突变的1例；1个基因座发生突变的18例，2个基因座同时发生基因突变的为1例；突变来自父亲与来自母亲的比例为13：2，4例来源不能确定。结论用Identifiler^TM荧光标记复合扩增试剂盒检测到1—2个基因座发生突变，须增加对其它遗传标记的检测。     

Science wars—How much risk should soldiers be exposed to in military experimentation?

With the threat of biological war becoming a more and more distinct possibility, there is a growing need for vaccines and cures for diseases. As warfare moves from the battlefield to the laboratory, the military must adapt its tactics in order to preserve national security. At the moment, soldiers consent to the risk associated with combat, but with the changing nature of war, the need may arise for soldiers to put themselves at risk not only through combat, but also through scientific experimentation, in order to produce vaccines or cures and ultimately maintain national security. By allowing soldiers to trade risk on the battlefield with risk in the laboratory, deeper research can be made into diseases and biological agents, and this would therefore lessen the threat of biological war or terrorism.     

Prevention for those who can pay: insurance reimbursement of genetic-based preventive interventions in the liminal state between health and disease

Clinical use of genetic testing to predict adult onset conditions allows individuals to minimize or circumvent disease when preventive medical interventions are available. Recent policy recommendations and changes expand patient access to information about asymptomatic genetic conditions and create mechanisms for expanded insurance coverage for genetic tests. The American College of Medical Genetics and Genomics (ACMG) recommends that laboratories provide incidental findings of medically actionable genetic variants after whole genome sequencing. The Patient Protection and Affordable Care Act (ACA) established mechanisms to mandate coverage for genetic tests, such as BRCA. The ACA and ACMG, however, do not address insurance coverage for preventive interventions. These policies equate access to testing as access to prevention, without exploring the accessibility and affordability of interventions. In reality, insurance coverage for preventive interventions in asymptomatic adults is variable given the US health insurance system''s focus on treatment. Health disparities will be exacerbated if only privileged segments of society can access preventive interventions, such as prophylactic surgeries, screenings, or medication. To ensure equitable access to interventions, federal or state legislatures should mandate insurance coverage for both predictive genetic testing and recommended follow-up interventions included in a list established by an expert panel or regulatory body.     

Simulation Detection in Handwritten Documents by Forensic Document Examiners

This study documents the results of a controlled experiment designed to quantify the abilities of forensic document examiners (FDEs) and laypersons to detect simulations in handwritten documents. Nineteen professional FDEs and 26 laypersons (typical of a jury pool) were asked to inspect test packages that contained six (6) known handwritten documents written by the same person and two (2) questioned handwritten documents. Each questioned document was either written by the person who wrote the known documents, or written by a different person who tried to simulate the writing of the person who wrote the known document. The error rates of the FDEs were smaller than those of the laypersons when detecting simulations in the questioned documents. Among other findings, the FDEs never labeled a questioned document that was written by the same person who wrote the known documents as “simulation.” There was a significant statistical difference between the responses of the FDEs and layperson for documents without simulations.     

刑事物证中的“保管链”

保证物证检验质量的前提条件是保证物证的原始性和完整性。借鉴美国刑事物证保管制度，在我国法庭科学实验室认证工作中，可以将“物证保管链”作为科学管理物证行之有效的方法加以推广。     

最新缴获物质“神仙水”案件检验与讨论

目的研究新型缴获物质＂神仙水＂外观、成分及毒品含量。方法对12起案件中的85个＂神仙水＂毒品样品检验结果进行归纳总结。结果样品为淡黄色浑浊液的占94.1%;甲基苯丙胺、MDMA、氯胺酮的检出率分别为90.6%、37.6%、84.7%,毒品成分为两种以上的占96.5%;定量检验结果：甲基苯丙胺、MDMA、氯胺酮的含量分别为0.004%~1.2%,0.004%~2.9%,0.01%~3.4%。结论不同宗案件的＂神仙水＂样品外观、成分及毒品含量不同;同一宗案件的不同＂神仙水＂样品外观、成分及毒品含量也有可能不同。     

To P or not to P? The Usefulness of P‐values in Quantitative Political Science Research

This contribution gives a short overview over the mechanics of significance testing in inferential statistics, in particular linear models, and tries to put the discussion about the usefulness of p‐values into a broader perspective of scientific practise. This discussion needs to be embedded into the larger debate about the credibility crises faced by empirical social science research. In particular, it seems of utmost importance to discuss what the profession as a whole, journals, publishers, as well as editors can do to encourage better research practise that generates reliable and useful empirical findings.     

The physical competence test of the Dutch National Police: The effects of wearing a police uniform on test performance

ABSTRACT

In this study, we investigated the effects of wearing a police uniform and gear on officers’ performance during the Physical Competence Test (PCT) of the Dutch National Police. In a counterbalanced within-subjects design, twenty-seven police officers performed the PCT twice, once wearing sportswear and once wearing a police uniform. The results showed clear indications that wearing a police uniform influenced the performance on the PCT. Participants were on average 14 seconds slower in a police uniform than in sportswear. Furthermore, performing the test in uniform was accompanied by higher RPE-scores and total physiological load. It seems that wearing a police uniform during the test diminishes the discrepancy between physical fitness needed to pass the simulated police tasks in the PCT and the job-specific physical fitness that is required during daily police work. This suggests that wearing a police uniform during the test will increase the representativeness of the testing environment for the work field.